Amplitude stabilization control system and method for a giant magnetostrictive ultrasonic vibration transducer

Abstract

The application discloses a kind of giant magnetostrictive ultrasonic vibration transducer amplitude stability control systems and methods, wherein, system includes: sampling module, for collecting the actual current of giant magnetostrictive ultrasonic machining system;Force feedback measurement module, for measuring the force signal of giant magnetostrictive ultrasonic machining system, according to the resonant current of force signal adjustment;FPGA module, for determining the driving frequency of ultrasonic power supply according to actual current and resonant current, and obtain target resonant frequency, obtain target driving voltage according to the target cutting force and target resonant frequency input by force feedback measurement module, to carry out amplitude stability control to giant magnetostrictive ultrasonic vibration transducer of giant magnetostrictive ultrasonic machining system based on target driving voltage and target resonant frequency. Therefore, solve the problem that ultrasonic machining system tracking target and vibration performance change due to impedance characteristic change in related technology, frequency tracking and amplitude stability control cannot be accurately realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic precision special machining, and particularly relates to an amplitude stable control system and method of a magnetostrictive ultrasonic vibration transducer. BACKGROUND

[0002] In the related art, a rotating ultrasonic machining system utilizes rotating ultrasonic machining technology to apply certain regular and periodic ultrasonic vibration to a tool head in the rotating ultrasonic machining system, wherein the main performance evaluation index of the rotating ultrasonic machining system is ultrasonic amplitude, and a large ultrasonic amplitude can increase machining efficiency.

[0003] However, in the related art, due to the impedance characteristic change of the ultrasonic machining system, the tracking target and vibration performance of the ultrasonic machining system change in real time, which reduces the tracking accuracy and cannot accurately and quickly realize frequency tracking and amplitude stability control. SUMMARY

[0004] The present application is based on the following problems and realizations of the inventors:

[0005] Rotating ultrasonic machining technology applies certain regular and periodic ultrasonic vibration to a tool head in a certain direction to improve machining effect. Compared with the traditional machining method without applying ultrasonic vibration, rotating ultrasonic machining has significant advantages in many aspects, such as improving machining efficiency and precision, reducing cutting force, prolonging tool life, etc.

[0006] Magnetostriction is a phenomenon that the size of a ferromagnetic body changes under the influence of a magnetic field. Due to the magnetostriction phenomenon, the magnetostrictive material can repeatedly stretch and shrink under the action of an applied alternating magnetic field, thereby generating vibration and realizing energy conversion from electromagnetic energy to mechanical energy or acoustic energy. Based on the above principle, the magnetostrictive material can be applied to a transducer.

[0007] For the ultrasonic machining system, the resonant frequency thereof will change after being subjected to an external load, that is, the frequency shift phenomenon, the frequency shift causes the driving frequency to be inconsistent with the resonant frequency, seriously affects the output amplitude of the ultrasonic machining system, and even causes the ultrasonic machining system to be detuned, so that the ultrasonic machining system no longer outputs ultrasonic vibration. Therefore, the ultrasonic machining system needs to be subjected to frequency tracking so as to always work at the resonant frequency. Meanwhile, after being subjected to an external load, even if frequency tracking is performed, since the resonant frequency of the ultrasonic machining system has changed, a deviation is generated between the mechanical resonant frequency originally designed for the ultrasonic machining system and the resonant frequency, the vibration state of the ultrasonic machining system will deviate from the initial state, and after the resonant frequency is shifted due to the external load, the impedance state of the ultrasonic machining system will also change to a certain extent. After frequency tracking is performed, the electrical characteristics of the ultrasonic machining system will also change. Therefore, the ultrasonic amplitude of the ultrasonic machining system will also change, which adversely affects the precision machining of the ultrasonic machining system, and needs to be improved.

[0008] The application provides an ultramagnetic strain ultrasonic vibration transducer amplitude stability control system and method to solve the problem that in the prior art, due to the change in the impedance characteristics of an ultrasonic machining system, the tracking target and vibration performance of the ultrasonic machining system change in real time, the tracking accuracy is reduced, and the frequency tracking and amplitude stability control cannot be accurately and quickly realized.

[0009] The first aspect of the application provides an ultramagnetic strain ultrasonic vibration transducer amplitude stability control system, comprising: a sampling module configured to collect an actual current generated by an ultramagnetic strain ultrasonic machining system; a force feedback measurement module configured to measure a force signal generated by the ultramagnetic strain ultrasonic machining system and adjust a resonant current of a resonant point of the ultramagnetic strain ultrasonic machining system according to the force signal; and an FPGA (Field Program Gate Way) module configured to determine a driving frequency of an ultrasonic power supply in the ultramagnetic strain ultrasonic machining system according to the actual current and the resonant current, obtain a target resonant frequency by using the driving frequency, and obtain a target driving voltage according to a target cutting force input by the force feedback measurement module and the target resonant frequency, so as to perform amplitude stability control on an ultramagnetic strain ultrasonic vibration transducer of the ultramagnetic strain ultrasonic machining system based on the target driving voltage and the target resonant frequency.

[0010] Optionally, in an embodiment of the application, the system of the embodiment of the application further comprises an amplification module configured to amplify the driving signal.

[0011] Optionally, in an embodiment of the application, the system of the embodiment of the application further comprises a digital display tube configured to receive at least one frequency tracking parameter input by a user.

[0012] Optionally, in an embodiment of the present application, the at least one frequency tracking parameter comprises any one of an initial driving frequency, a driving voltage, a frequency tracking current, a frequency tracking step, a frequency tracking speed, and a sampling time length.

[0013] The second aspect embodiment of the present application provides a magnetostrictive ultrasonic vibration transducer amplitude stability control method, comprising the following steps: collecting the actual current generated by the magnetostrictive ultrasonic machining system; measuring the force signal generated by the magnetostrictive ultrasonic machining system; adjusting the resonance current of the resonance point of the magnetostrictive ultrasonic machining system according to the force signal; determining the driving frequency of the ultrasonic power supply of the magnetostrictive ultrasonic machining system according to the actual current and the resonance current, and obtaining the target cutting force and the target resonance frequency by using the driving frequency, and obtaining the target driving voltage according to the target cutting force and the target resonance frequency, so as to perform amplitude stability control on the magnetostrictive ultrasonic vibration transducer of the magnetostrictive ultrasonic machining system based on the target driving voltage and the target resonance frequency.

[0014] Optionally, in an embodiment of the present application, the method of the embodiment of the present application further comprises: amplifying the driving signal.

[0015] Optionally, in an embodiment of the present application, the method of the embodiment of the present application further comprises: receiving the at least one frequency tracking parameter input by the user.

[0016] Optionally, in an embodiment of the present application, the at least one frequency tracking parameter comprises any one of the initial driving frequency, the driving voltage, the frequency tracking current, the frequency tracking step, the frequency tracking speed, and the sampling time length.

[0017] The third aspect embodiment of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the magnetostrictive ultrasonic vibration transducer amplitude stability control method as described in the above embodiments.

[0018] The fourth aspect embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the magnetostrictive ultrasonic vibration transducer amplitude stability control method as described above.

[0019] The embodiment of the application can collect the actual current of the giant magnetostrictive ultrasonic machining system through the sampling module, measure the force signal of the giant magnetostrictive ultrasonic machining system by using the force feedback measurement module, adjust the resonance current according to the force signal, determine the driving frequency of the ultrasonic power supply according to the actual current and the resonance current through the FPGA module, obtain the target resonance frequency by using the driving frequency, and obtain the target driving voltage according to the target cutting force and the target resonance frequency input by the force feedback measurement module, so as to control the amplitude stability of the giant magnetostrictive ultrasonic vibration transducer based on the target driving voltage and the target resonance frequency, thereby improving the tracking accuracy, and accurately and quickly realizing frequency tracking and amplitude stability control. Therefore, the problem that the tracking target and vibration performance of the ultrasonic machining system change in real time due to the impedance characteristic change of the ultrasonic machining system, the tracking accuracy is reduced, and frequency tracking and amplitude stability control cannot be accurately and quickly realized in the related art is solved.

[0020] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A structural schematic diagram of a giant magnetostrictive ultrasonic vibration transducer amplitude stability control system according to an embodiment of the application;

[0023] Figure 2 A structural schematic diagram of a giant magnetostrictive ultrasonic machining system according to one specific embodiment of the application;

[0024] Figure 3 A schematic diagram of a giant magnetostrictive ultrasonic machining system amplitude stability control system according to one specific embodiment of the application;

[0025] Figure 4 A principle schematic diagram of impedance change of a giant magnetostrictive ultrasonic machining system according to one specific embodiment of the application;

[0026] Figure 5 A principle schematic diagram of amplitude change of a giant magnetostrictive ultrasonic machining system according to one specific embodiment of the application;

[0027] Figure 6 A resonance frequency tracking schematic diagram of a giant magnetostrictive ultrasonic machining system according to one specific embodiment of the application;

[0028] Figure 7 A giant magnetostrictive ultrasonic machining system amplitude stability control schematic diagram according to one specific embodiment of the application;

[0029] Figure 8 This is a flowchart of an amplitude stabilization control method for a giant magnetostrictive ultrasonic vibration transducer provided according to an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0032] The following is a schematic diagram of the structure of the amplitude stabilization control system for a supermagnetostrictive ultrasonic vibration transducer according to an embodiment of this application, with reference to the accompanying drawings. Figure 1 This is a schematic diagram of the amplitude stabilization control system of the supermagnetostrictive ultrasonic vibration transducer according to an embodiment of this application.

[0033] This application relates to amplitude stabilization control of a magnetostrictive ultrasonic vibration transducer in a magnetostrictive ultrasonic machining system. The magnetostrictive ultrasonic machining system includes a magnetostrictive material (i.e., the transducer), a coil, a magnetic conductor, a housing, a coil frame, a preload block, a permanent magnet, a pressure block, an output block, a tool holder, and a loosely coupled power transmission device. The pressure block has threaded holes for mounting a preload bolt and applying preload force. The preload bolt connects the pressure block and the housing, and the pressure block is connected to the preload block to transmit the preload force. The magnetostrictive ultrasonic machining system is installed inside the tool holder and fixed to the machine tool spindle via the tool holder. It is driven by the loosely coupled power transmission device. The magnetostrictive material undergoes slicing to suppress skin effect and eddy current loss, and is bonded using epoxy resin adhesive.

[0034] like Figure 1 As shown, the amplitude stabilization control system 10 of the supermagnetostrictive ultrasonic vibration transducer includes: a sampling module 100, a force feedback measurement module 200, and an FPGA module 300.

[0035] Specifically, the sampling module 100 is used to collect the actual current generated by the supermagnetostrictive ultrasonic processing system.

[0036] In actual implementation, the embodiments of this application can be equipped with a sampling module 100, which can collect the actual current generated by the supermagnetostrictive ultrasonic processing system. The output terminal of the sampled actual current is connected to the input terminal of the AD module 600 mounted in the FPGA module 300 in the following steps, thereby effectively improving the executability of amplitude stability control.

[0037] For example, such as Figure 2 The diagram shows the structure of a magnetostrictive ultrasonic machining system. The system includes an ultrasonic power supply 10, a compensation capacitor 20, a loosely coupled power transmission device 30, a transducer 40, a tool holder 50, and an amplitude transformer 60. The transducer 40 is fixed in the tool holder 50, and the amplitude transformer 60 is connected to the transducer 40 via a threaded connection. The loosely coupled power transmission device 30 consists of a primary side 301 and a secondary side 302. The secondary side 302 is bolted to the tool holder 50, while the primary side 301 is connected to the machine tool. During machining, the secondary side 302 rotates with the tool holder, while the primary side 301 remains fixed to the machine tool. The secondary side 302 is connected to the transducer, and the primary side 301 is connected to the ultrasonic power supply 10 via the compensation capacitor 20. In use, the transducer 40 is powered through induced power transmission, causing it to vibrate at ultrasonic frequencies. This vibration is transmitted to the tool via the amplitude transformer 60.

[0038] In this embodiment, a compensation capacitor 20 can be provided. The compensation capacitor 20 can be a manually adjustable variable capacitor. During use, the optimal compensation of the giant magnetostrictive ultrasonic vibration transducer can be determined by manually adjusting the compensation capacitor 20.

[0039] The force feedback measurement module 200 is used to measure the force signal generated by the supermagnetostrictive ultrasonic machining system and adjust the resonant current at the resonant point of the supermagnetostrictive ultrasonic machining system according to the force signal.

[0040] As one possible implementation, embodiments of this application may include a force feedback measurement module 200, which can measure the force signal generated by the supermagnetostrictive ultrasonic processing system. For example, the force signal of the supermagnetostrictive ultrasonic processing system can be measured in real time by a piezoelectric ceramic force measurement module. The piezoelectric ceramic force measurement module outputs an electrical signal through the piezoelectric effect, obtains the corresponding force signal through the electrical signal, and adjusts the resonant current of the resonant point of the supermagnetostrictive ultrasonic processing system according to the force signal, thereby effectively improving the accuracy of the force signal measurement.

[0041] The FPGA module 300 is used to determine the driving frequency of the ultrasonic power supply in the giant magnetostrictive ultrasonic machining system based on the actual current and the resonant current, and to obtain the target resonant frequency using the driving frequency. The target driving voltage is obtained based on the target cutting force and the target resonant frequency input by the force feedback measurement module, so as to perform amplitude stabilization control of the giant magnetostrictive ultrasonic vibration transducer of the giant magnetostrictive ultrasonic machining system based on the target driving voltage and the target resonant frequency.

[0042] In some embodiments, the present application may include an FPGA module 300, which can determine the driving frequency of the ultrasonic power supply in the giant magnetostrictive ultrasonic machining system, and use the driving frequency to obtain the cutting force and resonant frequency, thereby obtaining the driving voltage. Based on the driving voltage, the amplitude of the giant magnetostrictive ultrasonic vibration transducer can be stabilized, thereby achieving precise and rapid frequency tracking and amplitude stability control.

[0043] Among them, such as Figure 3 As shown, the FPGA module 300 can realize frequency tracking and output the ultrasonic power supply 10 of the supermagnetostrictive ultrasonic machining system. The FPGA module 300 is equipped with an AD module 600 and a DA module 700. The DA module 700 outputs a single-frequency ultrasonic AC signal. The DA module 700 has dual outputs, one of which is a drive signal and the other is a reference signal. The AD module 600 collects the electrical signal and feeds it back to the FPGA module 300 for frequency tracking. The AD module 600 has three inputs, one of which is the electrical signal fed back by the ultrasonic system, the second is the reference signal provided by the DA module 700, and the third is the electrical signal that feeds back the cutting force.

[0044] Optionally, in one embodiment of this application, the system 10 of this application embodiment further includes: an amplification module 400.

[0045] The amplification module 400 is used to amplify the drive signal.

[0046] In some embodiments of this application, an amplification module 400 may be provided to amplify the driving signal, for example, such as... Figure 3 As shown, the drive signal output by the DA module 700 can be connected, and after amplification, the drive signal can be used to drive the supermagnetostrictive ultrasonic processing system, effectively improving the feasibility of amplitude stability control.

[0047] Optionally, in one embodiment of this application, the system 10 of this application embodiment further includes: a digital display tube 500.

[0048] The digital display tube 500 is used to receive at least one frequency tracking parameter input by the user.

[0049] In some embodiments, the present application embodiment may be configured with a digital display tube 500, which can receive at least one frequency tracking parameter from the following steps input by the user, effectively improving the working efficiency of frequency tracking.

[0050] In one embodiment of this application, at least one frequency tracking parameter includes any one of the following: initial drive frequency, drive voltage, tracking current, tracking step size, tracking speed, and sampling duration.

[0051] In some embodiments, at least one frequency tracking parameter in this application includes the initial driving frequency, driving voltage, tracking current, tracking step size, tracking speed, and sampling duration, which effectively improves the accuracy of frequency tracking.

[0052] For example, such as Figure 3 The diagram shown is a schematic of the amplitude stabilization control system of the supermagnetostrictive ultrasonic processing system, which may include a sampling module 100, a force feedback measurement module 200, an FPGA module 300, an amplification module 400, a digital display tube 500, an AD module 600, and a DA module 700.

[0053] The input terminals of the FPGA module 300 are connected to the AD module 600 and the digital display tube 500, respectively, and the output terminal is connected to the DA module 700. The DA module 700 is a dual-output module. Its input terminal is connected to the FPGA module 300, one of its output driving signals is connected to the amplification module 400, and the other output reference signal is connected to the AD module 600. The reference signal can determine the working status of the supermagnetostrictive ultrasonic processing system.

[0054] Next, the input terminal of the amplification module 400 is connected to the output terminal of the DA module 700, and the output terminal is connected to the compensation capacitor 20. The compensation capacitor 20 is connected to the loosely coupled power transmission device 30. The input terminal of the sampling module 100 is connected to the circuit of the super-magnetostrictive ultrasonic machining system, which can acquire the current signal of the super-magnetostrictive ultrasonic machining system. The output terminal is connected to the input terminal of the AD module 600. The input terminal of the AD module 600 is connected to the reference signal output by the DA module 700, the current signal measured by the sampling module 100, and the force signal measured by the force feedback measurement module 200, respectively. The output terminal is connected to the FPGA module 300. The digital display tube 500 can be a touch resistive screen, which can input specified parameters by the user. Its output terminal is connected to the FPGA module 300. The force feedback measurement module 200 is installed on the machine tool to measure the force signal generated during machining. The generated force signal is connected to the FPGA module 300.

[0055] Furthermore, in the use of this embodiment, the required frequency tracking parameters, such as initial driving frequency, driving voltage, tracking current, tracking step size, tracking speed and sampling duration, are first input through the digital display tube 500. The input parameters are output to the FPGA module 300, and the constant frequency driving mode, resonant tracking mode and amplitude stabilization control mode can be turned on by the switch respectively.

[0056] Among them, the constant frequency mode uses the initial driving frequency and driving voltage for driving without frequency tracking; the resonant tracking mode tracks the resonant frequency during processing, and the driving frequency supplied by the power supply to the ultrasonic circuit changes continuously during operation; and the amplitude stabilization control mode ensures constant amplitude during processing. When using the frequency tracking and amplitude stabilization control functions, this embodiment can integrate the electrical signal collected by the sampling module 100, the reference signal output by the AD module 600, and the force signal fed back by the force feedback measurement module 200 to perform frequency tracking and amplitude stability control on the giant magnetostrictive ultrasonic processing system.

[0057] Furthermore, for giant magnetostrictive ultrasonic machining systems, the resonant frequency changes and the impedance characteristics change when subjected to an external load. An impedance analyzer can be used to measure the impedance shift of the giant magnetostrictive ultrasonic machining system after being subjected to an external force, such as... Figure 4 As shown, after impedance shift occurs, the tracking index of the supermagnetostrictive ultrasonic machining system needs to be changed in real time. Therefore, during frequency tracking, the tracking index can be automatically adjusted based on the force signal fed back by the force feedback measurement module 200. In this embodiment, the tracking index used is the resonant current at the resonant point of the supermagnetostrictive ultrasonic machining system. By using an impedance analyzer to sweep the frequency, the resonant frequency of the supermagnetostrictive ultrasonic machining system can be obtained. Furthermore, a new resonant frequency under no-load conditions can be obtained from the resonant frequency. The resonant current under different cutting forces can be further calculated using the following formula:

[0058]

[0059] Where U is the driving voltage, I r For the resonant current, R r L is the system resistance. e For the system circuit inductance, C e For the system compensation capacitor, ω n X is the system resonant frequency. ωn The reactance is the equivalent of the system's mechanical impedance and secondary impedance.

[0060] Furthermore, based on frequency tracking, amplitude stability control can be performed on the giant magnetostrictive ultrasonic machining system. For this system, even with frequency tracking, the amplitude is not constant under external load. Vibration theory can be used to obtain a predictive model of the ultrasonic vibration under load, and from this, the ultrasonic amplitude of the giant magnetostrictive ultrasonic machining system under different loads and driving voltages can be obtained, such as... Figure 5 As shown, since the driving voltage that maintains a constant amplitude under different cutting forces in the supermagnetostrictive ultrasonic machining system can be further obtained, that is:

[0061]

[0062] Where F is the cutting force, and e, k, b, s and d are relevant parameters of the system's mechanical structure. These parameters need to be identified through pre-experimentation before use.

[0063] For example, combined Figure 6 and Figure 7 As shown, when performing frequency tracking, the giant magnetostrictive ultrasonic machining system can first set the initial driving frequency, driving voltage, tracking current, tracking step size, tracking speed, and sampling time. The sampled current signal is processed to obtain an effective value. By comparing the acquired current signal with the resonant current signal, it can be determined whether the giant magnetostrictive ultrasonic machining system needs to perform frequency tracking.

[0064] Next, when the actual current I collected is less than the resonant current I... r When the driving frequency of the power supply increases, and the actual current I is greater than the resonant current I... r When the driving frequency of the power supply decreases, the actual current IA and the resonant current IB decrease. r When they are equal, keep the driving frequency constant, and simultaneously obtain the cutting force F and the new resonant frequency f. n Based on the cutting force F and the new resonant frequency f n To obtain a new resonant current value I r Then, proceed to the next sampling cycle.

[0065] In addition, such as Figure 7 As shown, when performing amplitude stability control, based on the above steps, the cutting force F and the new resonant frequency f can be used as a reference. n A new driving voltage U is obtained, and a new resonant current value I is obtained through calculation. r This allows for the control of the amplitude stability of the super magnetostrictive transducer, and the process then enters the next sampling cycle.

[0066] In summary, the amplitude stabilization control system for giant magnetostrictive transducers is suitable for different giant magnetostrictive ultrasonic systems. Based on the resonant frequency characteristic curves of different systems, the corresponding initial driving frequency, driving voltage, tracking current, tracking step size, tracking speed, and sampling time can be set to achieve the optimal tracking effect. At the same time, the tracking performance of the giant magnetostrictive transducer amplitude stabilization control system can be adjusted by regulating the initial driving frequency, driving voltage, tracking current, tracking step size, tracking speed, and sampling time.

[0067] The amplitude stabilization control system for a magnetostrictive ultrasonic vibration transducer proposed in this application can acquire the actual current of the magnetostrictive ultrasonic machining system through a sampling module, measure the force signal of the magnetostrictive ultrasonic machining system using a force feedback measurement module, adjust the resonant current according to the force signal, determine the driving frequency of the ultrasonic power supply through an FPGA module based on the actual current and the resonant current, obtain the target resonant frequency using the driving frequency, and obtain the target driving voltage based on the target cutting force and the target resonant frequency input by the force feedback measurement module. Amplitude stabilization control of the magnetostrictive ultrasonic vibration transducer is then performed based on the target driving voltage and the target resonant frequency, thereby improving the tracking accuracy and enabling precise and rapid frequency tracking and amplitude stability control. This solves the problem in related technologies where changes in the impedance characteristics of the ultrasonic machining system cause real-time changes in the tracking target and vibration performance, reducing tracking accuracy and hindering precise and rapid frequency tracking and amplitude stability control.

[0068] in, Figure 8 This is a flowchart illustrating a method for stabilizing the amplitude of a giant magnetostrictive ultrasonic vibration transducer, as provided in an embodiment of this application.

[0069] like Figure 8 As shown, the amplitude stabilization control method for the supermagnetostrictive ultrasonic vibration transducer includes the following steps:

[0070] In step S801, the actual current generated by the supermagnetostrictive ultrasonic processing system is collected.

[0071] In step S802, the force signal generated by the supermagnetostrictive ultrasonic machining system is measured.

[0072] In step S803, the resonant current at the resonant point of the supermagnetostrictive ultrasonic machining system is adjusted according to the force signal.

[0073] In step S804, the driving frequency of the ultrasonic power supply in the giant magnetostrictive ultrasonic machining system is determined based on the actual current and the resonant current, and the target resonant frequency is obtained using the driving frequency. The target driving voltage is obtained based on the target cutting force and the target resonant frequency, so as to perform amplitude stabilization control on the giant magnetostrictive ultrasonic vibration transducer of the giant magnetostrictive ultrasonic machining system based on the target driving voltage and the target resonant frequency.

[0074] Optionally, in one embodiment of this application, the method further includes amplifying the driving signal.

[0075] Optionally, in one embodiment of this application, the method further includes: receiving at least one frequency tracking parameter input by a user.

[0076] In one embodiment of this application, at least one frequency tracking parameter includes any one of the following: initial drive frequency, drive voltage, tracking current, tracking step size, tracking speed, and sampling duration.

[0077] It should be noted that the foregoing explanation of the embodiment of the amplitude stabilization control system for the giant magnetostrictive ultrasonic vibration transducer also applies to the amplitude stabilization control method of the giant magnetostrictive ultrasonic vibration transducer in this embodiment, and will not be repeated here.

[0078] The amplitude stabilization control method for a magnetostrictive ultrasonic vibration transducer proposed in this application involves: acquiring the actual current of the magnetostrictive ultrasonic machining system via a sampling module; measuring the force signal of the system using a force feedback measurement module; adjusting the resonant current based on the force signal; determining the driving frequency of the ultrasonic power supply using an FPGA module based on the actual current and the resonant current; obtaining the target resonant frequency using the driving frequency; and obtaining the target driving voltage based on the target cutting force and target resonant frequency input from the force feedback measurement module. This allows for amplitude stabilization control of the magnetostrictive ultrasonic vibration transducer based on the target driving voltage and target resonant frequency, thereby improving tracking accuracy and enabling precise and rapid frequency tracking and amplitude stability control. This solves the problem in related technologies where changes in the impedance characteristics of the ultrasonic machining system lead to real-time changes in the tracking target and vibration performance, reducing tracking accuracy and hindering precise and rapid frequency tracking and amplitude stability control.

[0079] Figure 9 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include:

[0080] The memory 901, the processor 902, and the computer program stored on the memory 901 and capable of running on the processor 902.

[0081] When the processor 902 executes the program, it implements the amplitude stabilization control method for the supermagnetostrictive ultrasonic vibration transducer provided in the above embodiments.

[0082] Furthermore, electronic devices also include:

[0083] Communication interface 903 is used for communication between memory 901 and processor 902.

[0084] The memory 901 is used to store computer programs that can run on the processor 902.

[0085] The memory 901 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0086] If the memory 901, processor 902, and communication interface 903 are implemented independently, then the communication interface 903, memory 901, and processor 902 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 9 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0087] Optionally, in a specific implementation, if the memory 901, processor 902, and communication interface 903 are integrated on a single chip, then the memory 901, processor 902, and communication interface 903 can communicate with each other through an internal interface.

[0088] The processor 902 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0089] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for stabilizing the amplitude of a supermagnetostrictive ultrasonic vibration transducer.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0093] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0094] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0095] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0096] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0097] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A control system for the amplitude stabilization of a giant magnetostrictive ultrasonic vibration transducer, characterized in that, include: The sampling module is used to collect the actual current generated by the supermagnetostrictive ultrasonic processing system. A force feedback measurement module is used to measure the force signal generated by the supermagnetostrictive ultrasonic processing system and adjust the resonant current at the resonant point of the supermagnetostrictive ultrasonic processing system according to the force signal. as well as The field-programmable gate array (FPGA) module is used to determine the driving frequency of the ultrasonic power supply in the super-magnetostrictive ultrasonic machining system based on the actual current and the resonant current, and to obtain the target resonant frequency using the driving frequency. The target driving voltage is obtained based on the target cutting force input by the force feedback measurement module and the target resonant frequency, so as to perform amplitude stabilization control on the super-magnetostrictive ultrasonic vibration transducer of the super-magnetostrictive ultrasonic machining system based on the target driving voltage and the target resonant frequency. The AD module and DA module are provided. The DA module has dual outputs, one output signal is a drive signal and the other output signal is a reference signal. The AD module has three inputs, one of which is an electrical signal fed back by the ultrasonic system, the second is a reference signal provided by the DA module, and the third is an electrical signal that feeds back the cutting force.

2. The system according to claim 1, characterized in that, Also includes: An amplification module is used to amplify the driving signal.

3. The system according to claim 1, characterized in that, Also includes: A digital display tube is used to receive at least one frequency tracking parameter input by the user.

4. The system according to claim 3, characterized in that, The at least one frequency tracking parameter includes any one of the following: initial drive frequency, drive voltage, tracking current, tracking step size, tracking speed, and sampling duration.

5. A method for amplitude stabilization control of a giant magnetostrictive ultrasonic vibration transducer, characterized in that, The amplitude stabilization control system for the supermagnetostrictive ultrasonic vibration transducer as described in any one of claims 1-4 is wherein the method comprises the following steps: The actual current generated by the supermagnetostrictive ultrasonic processing system is collected; Measure the force signal generated by the supermagnetostrictive ultrasonic processing system; Adjusting the resonant current at the resonant point of the supermagnetostrictive ultrasonic machining system according to the force signal; and The driving frequency of the ultrasonic power supply of the super magnetostrictive ultrasonic machining system is determined based on the actual current and the resonant current, and the target resonant frequency is obtained using the driving frequency. The target driving voltage is obtained based on the target cutting force and the target resonant frequency, so as to perform amplitude stabilization control on the super magnetostrictive ultrasonic vibration transducer of the super magnetostrictive ultrasonic machining system based on the target driving voltage and the target resonant frequency.

6. The method according to claim 5, characterized in that, Also includes: The driving signal is amplified.

7. The method according to claim 5, characterized in that, Also includes: Receive at least one frequency tracking parameter input from the user.

8. The method according to claim 7, characterized in that, The at least one frequency tracking parameter includes any one of the following: initial drive frequency, drive voltage, tracking current, tracking step size, tracking speed, and sampling duration.

9. An electronic device, characterized in that, include: The memory, the processor, and the computer program stored in the memory and executable on the processor, the processor executing the program to implement the amplitude stabilization control method for a supermagnetostrictive ultrasonic vibration transducer as described in any one of claims 5-8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the amplitude stabilization control method for a supermagnetostrictive ultrasonic vibration transducer as described in any one of claims 5-8.

Images